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Re: Method Chaining

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From Joonas Liik <liik.joonas@gmail.com>
Newsgroups comp.lang.python
Subject Re: Method Chaining
Date Sat, 18 Jun 2016 17:05:25 +0300
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On 18 June 2016 at 15:04, Pete Forman <petef4+usenet@gmail.com> wrote:
> Rustom Mody <rustompmody@gmail.com> writes:
>
>> On Friday, June 17, 2016 at 2:58:19 PM UTC+5:30, Steven D'Aprano wrote:
>>> On Fri, 17 Jun 2016 06:13 pm, Ned Batchelder wrote:
>>>
>>> > To me, it's a toss-up. The chained version is nice in that it
>>> > removes the repetition of "g". But the unchained version is more
>>> > explicit, and avoids the awkward parenthesis.
>>> >
>>> > I think I would lean toward the unchained version. Clearly tastes
>>> > can differ.
>>>
>>> Indeed. For what it's worth, I'm ever-so-slightly leaning towards
>>> Lawrence's taste here.
>>
>> More than 'slightly' out here!
>> One thing about python OOP that irritates me is the 'self.' clutter.
>> With a Pascal/VB style with-statement its naturally taken care of
>>
>> Yeah I know there is this FAQ:
>> https://docs.python.org/2/faq/design.html#why-doesn-t-python-have-a-with-statement-for-attribute-assignments
>>
>> I consider it bogus if we allow with to mean something like:
>> https://msdn.microsoft.com/en-us/library/wc500chb.aspx
>
> One subtle difference between your two citations is that VB uses a
> leading dot. Might that lessening of ambiguity enable a future Python to
> allow this?
>
> class Foo:
>     def .set(a):  # equivalent to def set(self, a):
>         .a = a    # equivalent to self.a = a
>
> Unless it is in a with statement
>
> with obj:
>     .a = 1                # equivalent to obj.a = 1
>     .total = .total + 1   # obj.total = obj.total + 1
>
> --
> Pete Forman
> --
> https://mail.python.org/mailman/listinfo/python-list

the leading dot does not resolve the ambiguity that arises from:

with ob_a:
    with ob_b:
        .attr_c = 42 # which object are we modifying right now?

also refer to "javascript the bad parts" about all the edege cases
that python would surely face.
also with is allready used for context managers..

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Thread

Method Chaining Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-16 19:02 -0700
  Re: Method Chaining Steven D'Aprano <steve@pearwood.info> - 2016-06-17 12:39 +1000
  Re: Method Chaining Michael Selik <michael.selik@gmail.com> - 2016-06-17 04:23 +0000
    Re: Method Chaining Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-16 21:37 -0700
      Re: Method Chaining Ned Batchelder <ned@nedbatchelder.com> - 2016-06-17 01:13 -0700
        Re: Method Chaining Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-17 01:38 -0700
          Re: Method Chaining Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-06-17 11:45 +0300
        Re: Method Chaining Steven D'Aprano <steve@pearwood.info> - 2016-06-17 19:28 +1000
          Re: Method Chaining Michael Selik <michael.selik@gmail.com> - 2016-06-17 13:34 +0000
            Re: Method Chaining Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-17 15:26 -0700
              Re: Method Chaining Michael Selik <michael.selik@gmail.com> - 2016-06-17 22:45 +0000
              Re: Method Chaining Michael Selik <michael.selik@gmail.com> - 2016-06-17 23:10 +0000
          Re: Method Chaining Rustom Mody <rustompmody@gmail.com> - 2016-06-17 09:48 -0700
            Re: Method Chaining Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-17 15:25 -0700
            Re: Method Chaining Pete Forman <petef4+usenet@gmail.com> - 2016-06-18 13:04 +0100
              Re: Method Chaining Joonas Liik <liik.joonas@gmail.com> - 2016-06-18 17:05 +0300
                Re: Method Chaining Pete Forman <petef4+usenet@gmail.com> - 2016-06-18 16:42 +0100
              Re: Method Chaining Rustom Mody <rustompmody@gmail.com> - 2016-06-18 08:35 -0700
                Re: Method Chaining Pete Forman <petef4+usenet@gmail.com> - 2016-06-19 11:16 +0100
              Re: Method Chaining Ethan Furman <ethan@stoneleaf.us> - 2016-06-18 13:47 -0700
              Re: Method Chaining Joonas Liik <liik.joonas@gmail.com> - 2016-06-19 14:56 +0300
              Re: Method Chaining Ethan Furman <ethan@stoneleaf.us> - 2016-06-19 08:01 -0700
              Re: Method Chaining Michael Torrie <torriem@gmail.com> - 2016-06-19 09:14 -0600
              Re: Method Chaining Ethan Furman <ethan@stoneleaf.us> - 2016-06-19 08:56 -0700
                Re: Method Chaining Rustom Mody <rustompmody@gmail.com> - 2016-06-19 09:03 -0700
        Re: Method Chaining Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-17 15:22 -0700
          Re: Method Chaining Ned Batchelder <ned@nedbatchelder.com> - 2016-06-17 17:02 -0700

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